OUCH!

You certainly THINK like a "&!#&)+~ lawyer"

If all of your readings and values at the vac pump are correct, then changing the pump seems like the right choice BUT, the only problem I have with that is that (please verify this with your expert mychanic) I understand that the three pin plug at the pump which receives the lock (ground) - unlock (12 volts) signal from the locks, are connected together within the pump. If this is the case then the pump is not at fault.

Perhaps the wire from the green wire pin is broken within the pump, if so it could cause your problem, and I'm not sure if you could get at it to inspect/repair it.

Let us know, and if the new pump solves the problem you may want to take the old pump apart just to see what is causing it to malfunction.



Regards,
Acky